Connections To Other Station Components
Unity has 2 axial, and 4 radial Common Berthing Mechanism (CBM) ports. In addition to connecting to the Zarya module, Unity currently connects to the U.S. Destiny Laboratory Module (added on STS-98), the Z1 truss (an early exterior framework for the station added on STS-92), the PMA-3 (also added on STS-92), and the Quest Joint Airlock (added on STS-104). In addition, the Leonardo and Raffaello Multi-Purpose Logistics Modules have each been berthed to Unity on multiple missions. During STS-120 the Harmony connecting module was temporarily berthed to the port-side hatch of Unity. Tranquility, with its multi-windowed cupola, was attached to Unity's port side during the STS-130 mission. However, recently NASA decided to leave the MPLM Leonardo permanently attached to the ISS, which as of STS-133 is located at the nadir side of Node 1.
Read more about this topic: Unity (ISS Module)
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